21081368

素因数分解:

$2^3\times 7^2\times {\mathrm{11}}^1\times {\mathrm{4889}}^1$

素因数の和:4920

約数の個数: 48

約数和(自身を含む): 50171400

約数和(自身を除く): 29090032

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 49, 56, 77, 88, 98, 154, 196, 308, 392, 539, 616, 1078, 2156, 4312, 4889, 9778, 19556, 34223, 39112, 53779, 68446, 107558, 136892, 215116, 239561, 273784, 376453, 430232, 479122, 752906, 958244, 1505812, 1916488, 2635171, 3011624, 5270342, 10540684, 21081368]

約数ペア:

[(1, 21081368), (2, 10540684), (4, 5270342), (7, 3011624), (8, 2635171), (11, 1916488), (14, 1505812), (22, 958244), (28, 752906), (44, 479122), (49, 430232), (56, 376453), (77, 273784), (88, 239561), (98, 215116), (154, 136892), (196, 107558), (308, 68446), (392, 53779), (539, 39112), (616, 34223), (1078, 19556), (2156, 9778), (4312, 4889)]